What part of speech is the word duck?

The word "duck" can be a few different parts of speech, depending on how it's used:

* Noun: A type of bird (e.g., "The duck swam in the pond.")

* Verb: To lower one's head or body suddenly (e.g., "He ducked to avoid the ball.")

* Verb: To avoid something (e.g., "She ducked her responsibilities.")

So, the part of speech depends on the context!